MATLAB: How to plot x y z coordinates

3d plotscoordinatessurf

Hello,

I have a 3×10 matrix and columns 1, 2 and 3 represent x,y and z coordinates respectively.

I want z to be used for the color data and surface height. I have tried with mesh/surf and other commands but it does not plot the z axis as the surface height.

Any help?

I have tried simple things such as: matrix=xlsread(filename); surf(matrix);

or matrix=xlsread(filename); X = matrix(:,1); Y = matrix(:,2); [x,y]=meshgrid(X,Y); Z = matrix(:,3); surf (x,y,Z);

but here I get the following message: 'Z must be a matrix, not a scalar or vector'

Any help with the coding would be appreciated, I am just trying to visualise some results. Thanks, Jo

Best Answer

One way to visualize your data would be

 plot3(X,Y,Z, 'o')

Related Solutions

MATLAB: How i can solve this problem? Pleas!

Your ‘T’ matrix must become a cell array. See my sample of ‘T’ for an example.

Once you do that, I would do something like this:

Y = [12.004
    13.1573 
    11.1665  
    11.8082    
    12.2129   
    12.8075   
    12.4167  
    11.5708   
    12.5798    
    13.7489];
T={'cluster2'; 'cluster1'; 'cluster3'; 'cluster9'; 'cluster0'; 'cluster7'; 'cluster4'}; % Sample Of Cell Array
[UnqClust,~,idx] = unique(T);                                                           % Unique Values & Locations
Out = Y(idx);                                                                           % Mapped Output
for k1 = 1:length(idx)
    fprintf(1, '\t%s\t%.4f\n', T{k1}, Out(k1))              % Demonstration Output (Delete Loop)
end
  cluster2  11.1665
  cluster1  13.1573
  cluster3  11.8082
  cluster9  12.4167
  cluster0  12.0040
  cluster7  12.8075
  cluster4  12.2129

MATLAB: Plotting an implicitly defined function in 3 dimensions

Something like this?

t =  linspace( -100, 100, 50 );
[x y] = meshgrid(t);
surf(x,y,4-x-y)

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Surfplot with surface color as a function of gradient (slope)